condition mean min max ZT0-3 34.54575 34.2372 34.8543 ZT4-7 47.7203 47.7203 47.7203 ZT8-11 58.1167 58.1167 58.1167 ZT12-15 0 0 0 ZT16-19 43.862 43.862 43.862 ZT20-23 40.30565 40.30565 40.30565